243775264 has 12 divisors (see below), whose sum is σ = 479932614. Its totient is φ = 121887616.

The previous prime is 243775261. The next prime is 243775271. The reversal of 243775264 is 462577342.

It is a happy number.

243775264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 228251664 + 15523600 = 15108^2 + 3940^2 .

It is not an unprimeable number, because it can be changed into a prime (243775261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3808957 + ... + 3809020.

Almost surely, 2^243775264 is an apocalyptic number.

It is an amenable number.

243775264 is a deficient number, since it is larger than the sum of its proper divisors (236157350).

243775264 is an equidigital number, since it uses as much as digits as its factorization.

243775264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7617987 (or 7617979 counting only the distinct ones).

The product of its digits is 282240, while the sum is 40.

The square root of 243775264 is about 15613.3040705675. The cubic root of 243775264 is about 624.6880696250.

The spelling of 243775264 in words is "two hundred forty-three million, seven hundred seventy-five thousand, two hundred sixty-four".